if_pppox.h revision 224b54f69543a5c0ec18f99bd717d2b724582eb6 
1/***************************************************************************
2 * Linux PPP over X - Generic PPP transport layer sockets
3 * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516)
4 *
5 * This file supplies definitions required by the PPP over Ethernet driver
6 * (pppox.c).  All version information wrt this file is located in pppox.c
7 *
8 * License:
9 *		This program is free software; you can redistribute it and/or
10 *		modify it under the terms of the GNU General Public License
11 *		as published by the Free Software Foundation; either version
12 *		2 of the License, or (at your option) any later version.
13 *
14 */
15
16#ifndef _UAPI__LINUX_IF_PPPOX_H
17#define _UAPI__LINUX_IF_PPPOX_H
18
19
20#include <linux/types.h>
21#include <asm/byteorder.h>
22
23#include <linux/socket.h>
24#include <linux/if_ether.h>
25#include <linux/if_pppol2tp.h>
26
27/* For user-space programs to pick up these definitions
28 * which they wouldn't get otherwise without defining __KERNEL__
29 */
30#ifndef AF_PPPOX
31#define AF_PPPOX	24
32#define PF_PPPOX	AF_PPPOX
33#endif /* !(AF_PPPOX) */
34
35/************************************************************************
36 * PPPoE addressing definition
37 */
38typedef __be16 sid_t;
39struct pppoe_addr {
40	sid_t         sid;                    /* Session identifier */
41	unsigned char remote[ETH_ALEN];       /* Remote address */
42	char          dev[IFNAMSIZ];          /* Local device to use */
43};
44
45/************************************************************************
46 * PPTP addressing definition
47 */
48struct pptp_addr {
49	__be16		call_id;
50	struct in_addr	sin_addr;
51};
52
53/************************************************************************
54 * Protocols supported by AF_PPPOX
55 */
56#define PX_PROTO_OE    0 /* Currently just PPPoE */
57#define PX_PROTO_OL2TP 1 /* Now L2TP also */
58#define PX_PROTO_PPTP  2
59#define PX_MAX_PROTO   3
60
61struct sockaddr_pppox {
62	__kernel_sa_family_t sa_family;       /* address family, AF_PPPOX */
63	unsigned int    sa_protocol;          /* protocol identifier */
64	union {
65		struct pppoe_addr  pppoe;
66		struct pptp_addr   pptp;
67	} sa_addr;
68} __packed;
69
70/* The use of the above union isn't viable because the size of this
71 * struct must stay fixed over time -- applications use sizeof(struct
72 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr
73 * type instead.
74 */
75struct sockaddr_pppol2tp {
76	__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
77	unsigned int    sa_protocol;    /* protocol identifier */
78	struct pppol2tp_addr pppol2tp;
79} __packed;
80
81struct sockaddr_pppol2tpin6 {
82	__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
83	unsigned int    sa_protocol;    /* protocol identifier */
84	struct pppol2tpin6_addr pppol2tp;
85} __packed;
86
87/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
88 * bits. So we need a different sockaddr structure.
89 */
90struct sockaddr_pppol2tpv3 {
91	__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
92	unsigned int    sa_protocol;    /* protocol identifier */
93	struct pppol2tpv3_addr pppol2tp;
94} __packed;
95
96struct sockaddr_pppol2tpv3in6 {
97	__kernel_sa_family_t sa_family; /* address family, AF_PPPOX */
98	unsigned int    sa_protocol;    /* protocol identifier */
99	struct pppol2tpv3in6_addr pppol2tp;
100} __packed;
101
102/*********************************************************************
103 *
104 * ioctl interface for defining forwarding of connections
105 *
106 ********************************************************************/
107
108#define PPPOEIOCSFWD	_IOW(0xB1 ,0, size_t)
109#define PPPOEIOCDFWD	_IO(0xB1 ,1)
110/*#define PPPOEIOCGFWD	_IOWR(0xB1,2, size_t)*/
111
112/* Codes to identify message types */
113#define PADI_CODE	0x09
114#define PADO_CODE	0x07
115#define PADR_CODE	0x19
116#define PADS_CODE	0x65
117#define PADT_CODE	0xa7
118struct pppoe_tag {
119	__be16 tag_type;
120	__be16 tag_len;
121	char tag_data[0];
122} __attribute__ ((packed));
123
124/* Tag identifiers */
125#define PTT_EOL		__cpu_to_be16(0x0000)
126#define PTT_SRV_NAME	__cpu_to_be16(0x0101)
127#define PTT_AC_NAME	__cpu_to_be16(0x0102)
128#define PTT_HOST_UNIQ	__cpu_to_be16(0x0103)
129#define PTT_AC_COOKIE	__cpu_to_be16(0x0104)
130#define PTT_VENDOR 	__cpu_to_be16(0x0105)
131#define PTT_RELAY_SID	__cpu_to_be16(0x0110)
132#define PTT_SRV_ERR     __cpu_to_be16(0x0201)
133#define PTT_SYS_ERR  	__cpu_to_be16(0x0202)
134#define PTT_GEN_ERR  	__cpu_to_be16(0x0203)
135
136struct pppoe_hdr {
137#if defined(__LITTLE_ENDIAN_BITFIELD)
138	__u8 type : 4;
139	__u8 ver : 4;
140#elif defined(__BIG_ENDIAN_BITFIELD)
141	__u8 ver : 4;
142	__u8 type : 4;
143#else
144#error	"Please fix <asm/byteorder.h>"
145#endif
146	__u8 code;
147	__be16 sid;
148	__be16 length;
149	struct pppoe_tag tag[0];
150} __packed;
151
152/* Length of entire PPPoE + PPP header */
153#define PPPOE_SES_HLEN	8
154
155
156#endif /* _UAPI__LINUX_IF_PPPOX_H */
157